Formula For Figuring Square Footage Of A Roof

Square feet of roof sqrt pitch 2 144 12 squares of roof square feet of roof span length 144 llratio is squares of roof 100.

Formula for figuring square footage of a roof. Multiply the length and width of each square or rectangle shaped plane. Calculation of roofing square feet is made easier. Once you have your roof s pitch divide the number by 12. The square footage of a hip roof area is identical to the square footage of a gable roof of the same size.

However this is a must if you re installing a new roof. Calculate the square footage area of a hip roof. The calculator cannot account for complex shapes based on a measurement of square footage alone. For example if your roof s pitch is 4 in 12 you would divide 4 by 12.

Estimate the pitch of the roof. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. Include dormers the small outjuttings over attic. The answer is the number of roofing squares for the roof.

The top ridge will be shorter than the one of the gable roof but the four hips will add. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. This would yield 1 3 next square your result.

Find the square footage of the roof. For instance if the roof is 1550 square feet then it is 16 squares. Free online roof shingles sheet area calculator. Calculate each plane separately.

The only difference in this calculation to the one for a gable roof area is the amount of the ridge. Measure the length and width of each portion of the roof multiply length by width for each plane and add the planes together for the total square footage. In cases where a roof has a complex shape such as in the image to the right measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area. If you re just replacing some old shingles you may not need to purchase underlayment.

A square simply refers to a 10 x 10 square of roofing. 1 300 x 1 05 1 365 square feet calculating the area true if you want to get the exact area measurement for your roof you can follow these steps. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. This is simply 100 square feet of roof.

If your roof is flat or has no more than a 3 in 12 pitch you can calculate its total square footage by simply multiplying the length by the width. To find the squares divide the overall roof area by 100 and then round up. How to calculate square feet of a roof step 1. Measure the length and width of every roof plane or surface.